Expandable Fusion Device and Method of Installation Thereof

An intervertebral implant comprising:

• a first endplate comprising an upper side, a lower side, a ramped surface, the ramped surface extending from the lower side;
• a second endplate comprising an upper side, a lower side, a ramped surface, the ramped surface extending from the lower side;
• and
• a central ramp comprising a first ramped surface for engagement with the ramped surface of the first endplate and a second ramped surface for engagement with the ramped surface of the second endplate,
• wherein the central ramp is configured to move in a first direction and cause the first and second endplates to move outwardly and away from one another, and
• wherein the intervertebral implant is configured for insertion into an intervertebral space down an endoscopic tube.

An intervertebral implant comprising:

• a central ramp comprising a body portion and an extension, the body portion having a first end and a second end, the body portion comprising first and second expansion portions extending from opposing sides of the body portion, the extension extending from the second end of the body portion;
• an actuation member comprising a flanged end and an extension extending from the flanged end, the extension having a threaded hole configured and dimensioned to receive the extension of the central ramp;
• a first endplate comprising a first end, a second end, an upper surface connecting the first end and the second end, a lower surface connecting the first end and the second end, a first side portion extending from the lower surface and connecting the first end and the second end, a second side portion extending from the lower surface and connecting the first end and the second end, and a central extension extending from the lower surface between the first and second side portions;
• and
• a second endplate comprising a first end, a second end, an upper surface connecting the first end and the second end, a lower surface connecting the first end and the second end, a first side portion extending from the lower surface and connecting the first end and the second end, a second side portion extending from the lower surface and connecting the first end and the second end, and a central extension extending from the lower surface between the first and second side portions,
• wherein the actuation member is configured to rotate in a first direction and cause the central ramp to move in a first direction, which results in the first and second endplates moving outwardly and away from one another,
• wherein the first and second expansion portions each comprise first and second ramped surfaces, the first and second side portions of the first endplate each comprise ramped surfaces, and the first and second side portions of the second endplate each comprise ramped surfaces, and wherein the first ramped surfaces of the first and second expansion portions are configured to engage the ramped surfaces of the first and second side portions of first endplate and the second ramped surfaces of the first and second expansion portions are configured to engage the ramped surfaces of the first and second side portions of the second endplate as the central ramp is moved in the first direction, and
• wherein the second end of the body portion comprises a first angled surface and a second angled surface and the central extension of the first and second endplates each include a ramped surface, and wherein the first angled surface of the body portion is configured to engage the ramped surface of the central extension of the first endplate and the second angled surface is configured to engage the ramped surface of the second endplate as the central ramp is moved in the first direction.